1. North Dakota Game and Fish Department Wildlife Health Laboratory, 3001 East Main Avenue, Bismarck, North Dakota 58501, USA
2. U.S. Department of Agriculture Natural Resource Conservation Service, 609 2nd Avenue North, Hettinger, North Dakota 58639, USA
3. Montana Department of Agriculture, 302 North Roberts Street, Helena, Montana 59601, USA
4. Farmland Wildlife Populations and Research Group, Minnesota Department of Natural Resources, 35365 800th Avenue, Madelia, Minnesota 56062, USA
5. School of Natural Resources, University of Tennessee Extension Central Region Office, 5201 Marchant Drive, Nashville, Tennessee 37211, USA
6. Department of Natural Resource Management, Box 2140, South Dakota State University, Brookings, South Dakota 57007, USA